Valtteri Bottas says Mercedes still has to unlock more potential from its package in order to fight Ferrari in Formula 1 this season. Bottas suggested last week that Ferrari was ahead of the pack, and while the squad had a dis-jointed opening two days to the second test – including a crash for Sebastian Vettel – the Finn maintained his thoughts on Mercedes’ opponents. It comes after Mercedes introduced a substantial aerodynamic package for the second test, in the wake of struggling with balance issues last week. 'It is better, but if it’s enough that’s the big question mark,' he said on the updated W10. 'But definitely [you can] feel improvements since...
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